woocommerce_email_attachments

// Ajouter pièces jointes aux emails
add_filter('woocommerce_email_attachments', 'ajouter_pieces_jointes_email', 10, 3);

function ajouter_pieces_jointes_email($attachments, $email_id, $order) {
    // Joindre CGV pour nouvelles commandes
    if ($email_id === 'customer_processing_order') {
        $cgv_path = get_template_directory() . '/documents/cgv.pdf';
        if (file_exists($cgv_path)) {
            $attachments[] = $cgv_path;
        }
    }
    
    // Joindre facture pour commandes complétées
    if ($email_id === 'customer_completed_order' && $order) {
        $invoice_path = '/path/to/invoices/invoice-' . $order->get_id() . '.pdf';
        if (file_exists($invoice_path)) {
            $attachments[] = $invoice_path;
        }
    }
    
    return $attachments;
}